Concrete-block mold.



@ww/Mofo @ttm J. HARTLEY.

GONGRBTE BLOCK MOLD. PPLIGATION AILBD 111113.23, 1910. 990,437, Patented Apr. 25, 1911.

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CONCRETE-BLOCK MOLD.

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Specification of Letters Patent.

Patented Apr. 25, 1911.

Application filed March 23, 1910. Serial No. 551,088.

To all whom fit may concern:

Be it known that I, JAPHETH HARTLEY, a citizen of the United States, residing at Gobleville, in the county of Van Buren and State of Michigan, have invented certain new and useful Improvements in Concrete- Block Molds, of which the following' is a specification.

This invention relates to improvements in concrete molds, and more particularly to molds for forming blocks to be used in building silos and the like or for facings for wooden or brick structure.

One object of this invention is to provide a mold in which can be formed blocks of either curved or straight cross-section.

Another object is to provide a mold having a combined pallet and cover.

Still another object is to provide a mold having means whereby an indefinite number of blocks may be formed one above the other.

A still further object is to construct a mold in which wet or slushy concrete may safely be used, and the block will thoroughly set without the loss of any of the material, or the removal of the inside forms.

vOther objects and advantages will be apparent from the following description and it will be understood that changes in the specific structure shown and described may be made within the scope of the claim without departing from the spirit of the invention.

In the drawings: Figure 1 is a longit-udinal section through my mold as assembled, Fig. 2 is a similar view to Fig. 1, showing a modified form for making curved blocks, Fig. 3 is a cross sectional view of the groove forming member, Fig. 4 is a cross sectional view of the tongue forming member, Fig. 5 is a similar view of a modified form of groove forming member, Fig. 6 is a similar view of a corresponding tongue forming member, Fig. 7 is a detail of the locking means for the frame. Fig. S is a cross scction of the mold.

Referring particularly to the drawings, in which is the preferred embodiment of my improved mold, 1 represents the outside form or frame having the side members 2, and end members 3. The side and end members 2 and 3 are hingedly connected together at 4, and at the diametrically opposite corner is provided with a fastener 5, which when open allows the frame 1 to be opened on the hinged corner 4. The other corners are rigidly secured together.

The fastener 5, comprises a pair of transversely apertured members 8 and 9, secured respectively to the side and end members 2 and 3. rlfhe members 8 and 9 are adapted to interlock as a hinge joint, and have a pin 10 passed through their apertures.

Each of the side and end members 2 and 3 are cut away at 11 and 12 to provide recesses.

A pallet board 13 formed of any suitable material and either flat or concaved is provided with the upstanding flanges or ribs 14 which are adapted to be received in the recesses 11 and 12 of the frame 1, thus securing both pallet and frame from lateral or longitudinal displacement, and inside forms when frame is removed. i

The upper face of the pallet- 13 may be provided with any configuration to form ornamental faces on the blocks. For instance, there may be the imitation of rock cut face, or ribs 15 which would form lines in the face of the block in imitation of brick joints.

lWithin the frame or form 1, are placed the inside forms 19, 20, 21 and 22. The forms comprise the strips 23 of any suitable material, but preferably metal, bent longitudinally at right angles. The forms 19 and 21 have a longitudinally disposed strip 24 rectangular in cross-section, secured within the angle of the strip and centrally on the face of one of the wings. This forms in the side and end of the resultant block a groove. The forms 21' and 22, are similar to 19 and 20, except that there are two strips 24 secured in a similar manner to the corresponding wing but on each side of its longitudinal center, forming a tongue on the opposite side and end of the finished block.

As seen in Figs. 5 and G, the strips 24 and 24 may be made with a centrally disposed dovetail rib 25 on one strip and a dovet-ail groove 26 on the other.

lhen it is desired to mold a block, the pallet 13 is placed on a tableor other suitable support and the form or frame 1 positioned thereon, with the flanges or ribs 14, seated within the recesses 11 and 12. rlhe inside forms 19, 20, 21, and 22 are then positioned against the inside faces of the frame 1. It is, of course, understood that the frame 1 is locked. The mixed concrete material is then placed in the mold and.

tamped down. A cover 27 is then placed over the mold. This cover is provided on its under face with ribs or ianges 28 similar to those on the pallet board 13, and are adapted to enter the recesses 11 and 12, which are formed of sufficient depth to accommodate the ribs of the pallet and cover. On the upper face of the cover 27 I have provided a second set of ribs or flanges 29, on which is placed the same frame 1 and a second set of inside forms 19, 20, 21 and 22 placed therein. Thus the cover 27 serves a double function; namely, a cover for the first mold and a pallet board for the second mold. lVlien the blocks have set sufliciently the fastener 5 is released by the removal of the pin 10 and the frames 1 swung open and are removed, when the pallet with the block thereon is allowed to dry, and another block formed above.

'When the blocks are to be used to form silos or other tubular structures the pallets are formed in convex shape, as seen in Fig. 2.

When used for straight faced blocks the pallets will be flat, but may have ornamental faces. Blocks used as wall facings are formed by embedding in the material wooden plugs or hollow metal tubes, by means of which they may be secured to the wall. These blocks, of course, would be much thinner than those used in actual constructive work.

It will thus be seen that I may use very wet and slushy concrete, which when the frame 1 is removed, willbe retained in shape by the inside forms, 19, 20, 21 and 22. The inside forms are allowed to remain sticking to the block until the block is dry or set suciently for their removal.

I have herein provided a simple, cheap and easily handled mold, and one in which an'infinite number of blocks may be molded at a single operation. Further, the concrete mixture need not be of a particular consistency, but may be used in a very wet and slushy condition.

rlhe strips 24 and 24 are also adapted to be placed in the bottom of the mold on the lower pallet or on the lower side of the cover, so that tongues or grooves may be formed on the faces of the blocks. Thisv is especially adapted for forming the corner joints, when the tongue on the edge of one block may be fitted in the groove in the face of the intersecting one.

That is claimed is:

A block mold comprising a rectangular frame, hinged connections at one corner of said frame, a locking means at the diametrically opposite corner of the frame, end and side formers disposed in the frame, said end and side formers being constructed to interlock at the corners of and within said frame, a base pallet having vertically extending side and end ribs, said ribs being formed on the upper face of the pallet and adjacent the marginal edges thereof, said ribs adapted to be positioned between the frame and the formers, and a cover for said frame having vertically depending side and end ribs adapted to engage between the said frame and formers from above, and vertically and upwardly extending ribs on said cover, whereby said cover is adapted as a pallet to support an additional frame and set of formers.

In testimony whereof I affix my signature, in presence of two witnesses.

JAPHETH HARTLEY.

Vitnesses EMMA BURKHEAD, RowLAND GEORGE I-IARTLEY.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

